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Monitoring wells, located approximately 1/2 mile north of the subject site, installed and <br /> maintained by GeoAudit, indicated a depth to groundwater of approximately 64 feet in <br /> February of 1994. <br /> TABLE 1 <br /> Analytical Results of Soil Samples <br /> May 17, 1993 <br /> mg/kg <br /> Sample TPH as TPH as Ethyl- Total <br /> ID Gasoline Diesel Benzene Toluene benzene Xylenes Lead <br /> #1 ND ND ND ND ND ND ND <br /> #2 ND ND ND ND ND ND 6 <br /> #3 ND ND ND ND ND ND--- 7 <br /> #4 2,000 770 ND 0.49 4.8 150 12 <br /> #5 ND ND ND ND ND ND 21 if <br /> Not detWed <br /> mg/kg=parts per million(ppm) <br /> 3.0 EXCAVATION PROCEDURES <br /> The scope of work is to conduct additional excavation activities in the area of the current <br /> excavation, attempting to further define the limits of the hydrocarbon affected soil and <br /> remove any contaminated soil. All removed hydrocarbon affected soil will be stockpiled on- <br /> site pending analytical results. A representative of GeoAudit will supervise and direct the <br /> excavation and will collect all necessary soil samples. To meet the project objectives, the <br /> following activities will be performed: <br /> 1) Prepare a site health and safety plan in accordance with Occupational Safety and <br /> Health Guidance Manual for Hazardous Waste Site Activities (Prepared by National <br /> Institute for Occupational Safety and Health Administration, U.S. Coast Guard and <br /> U.S. Environmental Protection Agency, 1985). <br /> 2) Notify PHS/EHD 48 hours prior to field work. <br /> 3) Excavate the contaminated soil using an excavator or backhoe. Petroleum <br /> hydrocarbons were detected in the soil sample collected from the southwest comer <br /> of the tank pit at a depth of approximately 7.5 feet. The excavation will be enlarged <br /> 0-1.s"l A.&S-11"%I-- <br /> 2 <br /> 935/3-9HRomr-u.wp <br />